package day04;
import java.util.Scanner;
public class Homework2 {
    public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);
        System.out.println("输入一个整数");
        int num = scan.nextInt();
        if (num>0){
            System.out.println("+");
        } else if (num>0) {
            System.out.println("-");
        }else{
            System.out.println("0");
        }

        System.out.println("输入年份");
        int year = scan.nextInt();
        System.out.println("请输入月份");
        int month = scan.nextInt();
        int days = 0;
        switch (month){
            case 1:
            case 3:
            case 5:
            case 7:
            case 8:
            case 10:
            case 12:
                days = 31;
                break;
            case 4:
            case 9:
            case 11:
                days = 30;
                break;
            case 2:
                if((year%4==0 && year%100!=0) || year%400==0){
                    days = 29;
                }else{
                    days =28;
                }
        }
        System.out.println(year+"年的"+month+"月有"+days+"天");


/*
        int count = 0;
        for (int year=1900;year<=2024;year++){
            if ((year%4==0 && year%100!=0) || year%400==0){
                System.out.println(year+"");
                count++;
                if(count%10==0){
                    System.out.println();
                }
            }
        }

 */
    }
}
